Muttiah Muralitharan - record breaking performance

There was further controversy after AustraliaÃÂs tour of Sri Lanka this year when he was reported for his `suspicious` doosra. More high-tech tests confirmed that the Murali did exceed the permitted five-degree tolerance level for spinners while bowling the delivery, but Bruce Elliott, the biomechanics expert who led the testing, called for further research into the setting of tolerance levels for bowlers. Image Courtesy: Getty Images